4 (3) remains the same 52 Which hydrocarbon has more than one possible structural formula? (1) C (2) C 2 (3) C 3 (4) C 4 53 What is the number of hydrogen atoms in a molecule of ethyne? (1) 6 (2) 2 (3) 8 (4) 4 54 In an aqueous solution, which compound will be acidic? (1) CH 3 COOH (2) C 3 OH OH 55 A process in which large molecules are broken down into smaller mole- cules is used commercially to increase the yield of gasoline from petroleum This process is called (1) polymerization (2) hydrogenation (3) esterification (4) cracking 56 Organic compounds must contain (1) oxygen (2) nitrogen (3) hydrogen (4) carbon 57 The angle formed between any two carbon-hydrogen bonds in a molecule of an organic compound is a(an) (1) dihedral angle (2) right angle (3) tetrahedral angle (4) acute angle 58 A specific arrangement of several atoms which gives characteristic properties to an organic molecule is known as a(an) (1) carboxyl group (2) functional group (3) group (4) alkyl group 59 The ability of the carbon atom to form covalent bonds result in the formation of compounds that are (1) molecular (2) ionic (3) polar (4) atomic 60 How many carbon atoms are in one molecule of 2,3,3-trimethyl- pentane? (1) 5 (2) 8 (3) 6 (4) The series of unsaturated hydrocarbons containing a triple bond shared between two adjacent carbon atoms is known as the (1) alkanes (2) alkenes (3) alkynes (4) benzenes 62 Addition reactions occur in unsaturated hydrocarbons rather than in saturated hydrocarbons because unsaturated hydrocarbons (1) contain multiple bonds (2) have a greater molecular mass (3) have tetrahedral bonds (4) contain more atoms 63 A dihydroxy alcohol that is made from ethane is (3) ethylene glycol (4) ethane (1) ethanol (2) glycerol 64 A long chain protein is an example of a(an) (1) fat (2) polymer (3) isomer (4) monomer 65 Which represents an unsaturated hydrocarbon? (1) C 2 (2) C 2 (3) C 3 (4) C 4 66 How many double bonds are in one molecule of 1,3-butadiene? (1) 1 (2) 2 (3) 3 (4) 4 67 Which is an isomer of 2-chloropropane? (1) butane (2) propane (3) 1-chlorobutane (4) 1-chloropropane Organic Chemistry Questions page 4 of 6

5 68 A fermentation reaction and a saponification reaction are similar in that they both can produce (1) an ester (2) an alcohol (3) an acid (4) a soap 69 Which is a saturated hydrocarbon? (1) C 3 (2) C 6 (3) C 2 OH (4) C 2 O 2 70 Which molecule will have a single pi bond? (1) benzene (2) propene (3) propane (4) propyne 71 CH 3 OH The above organic compound is classified as (2) an ester (3) an alcohol (4) an organic acid (1) a carbohydrate 72 Which organic molecule undergoes resonance? (1) benzene (2) propyne (3) methane (4) ethanol 73 As the molecular mass of the compounds of the alkane series increases their boiling points (1) decreases (2) increases (3) remains the same 74 As the number of carbon atoms in the members of the alkene series increases, the ratio of carbon atoms to hydrogen atoms (1) decreases (2) increases (3) remains the same 75 Which compound is most likely to react by addition? (1) C (2) C 3 (3) C 4 76 Which alcohol contains three hydroxyl groups per molecule? (1) propanol (2) glycerol (3) butanol (4) pentanol 77 Toluene belongs to the same series of hydrocarbons as (1) benzene (2) propene (3) pentene (4) butene 78 A hydrocarbon molecule containing one triple covalent bond is classified as an (1) alkene (2) alkane (3) alkyne (4) alkadiene 79 Both cellulose and proteins are classified as (1) aldehydes (2) esters (3) polymers (4) ketones 80 The compound 2-propanol is classified as a (1) primary alcohol (2) secondary alcohol (3) tertiary alcohol (4) dihydroxy alcohol 81 What is the total number of hydrogen atoms in a molecule of butene? (1) 10 (2) 8 (3) 6 (4) 4 82 Which of the following compounds has the greatest possible number of isomers? (1) butane (2) ethane (3) pentane (4) propane 83 Which is the correct molecular formula of pentene? (1) C 5 (2) C 5 (3) C 5 H The bonds between the atoms in an organic molecule are generally (2) coordinate covalent (3) covalent (4) hydrogen (1) ionic 85 As the length of the chain of carbon atoms in molecules of the alkene series increases, the number of double bonds per molecule (1) decreases (2) increases Organic Chemistry Questions page 5 of 6

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